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SUBSIDENCE MONITORING DATA <br />Semi-annual Report, June - December 1991 <br />Cyprus Empire Coai Corporation, Eagle Mine No. 5 <br />D-Series Line (centerline) <br /> 07/12/1990* Surve Elevations (ft) <br /> Profile Pre-mining Previous <br />Monitoring Distance Elevation Report Subsidence (ft) <br />Point (ft) Northin Eastin (ft) 04/16/91 07/27/91 11/23/91 This Period Total <br />D1 0 403248.4 1405094.9 6658.5 6658.5 6658.5 6656.5 0.0 0.0 <br />D2 50 403240.0 1405141.0 6668.5 6668.5 6668.5 6668.5 0.0 0.0 <br />D3 100 403228.8 1405192.2 6679.5 6679.5 6679.5 6679.5 0.0 0.0 <br />D4 150 403218.2 1405240.9 6691.6 6691.6 6691.6 6691.6 0.0 0.0 <br />DS 200 403210.1 1405291.3 6703.0 6703.0 6703.0 6702.8 -0.1 -0.1 <br />D6 250 403203.8 1405338.7 6119.2 6719.2 6719.2 6719.0 -0.2 -0.2 <br />D7 300 403189.0 1405389.7 6737.8 6737.8 6737.8 6737.6 -0.2 -0.2 <br />DB 350 403180.7 1405438.8 6751.5 6751.6 6751.6 6751.6 0.0 0.0 <br />D9 400 403173.3 1405485.9 6762.6 6762.6 6762.6 6762.6 0.0 0.0 <br />D10 450 403164.5 1405534.4 6773.9 6773.9 6773.9 6773.6 -0.3 -0.3 <br />D11 500 403154.7 1405584.4 6785.6 6785.6 6785.6 6785.1 -0.5 -0.5 <br />Dl2 550 403144.4 1405632.6 6798.] 6798.1 6798.3 6797.1 -1.0 -1.0 <br />* All pre mining elevations represent post-E-seam mining surface elevations <br />